Job Description Insight Global is seeking a Web Performance Engineer who ensures optimal speed and responsiveness across web, iOS, and Android platforms by defining and maintaining performance budgets and KPIs. They monitor real-time and synthetic performance data to identify issues, trends, and opportunities for improvement. This role involves troubleshooting and root-cause analysis for slowdowns across frontend, backend, and network layers. The engineer partners with product and engineering teams to build efficient, fast-loading pages and screens while improving caching, content delivery, and asset-loading strategies. They perform performance testing and profiling using tools like Lighthouse, WebPageTest, and platform-specific profilers, and collaborate with API, CDN, and backend teams to enhance overall responsiveness. Additionally, they contribute to automation, observability, and performance-focused CI/CD processes while sharing best practices and recommending tools and architectural improvements. We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to HR@insightglobal.com.To learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy: https://insightglobal.com/workforce-privacy-policy/. Skills and Requirements - 7+ years experience as a frontend performance engineer - Experience with RUM data ( Real User Monitoring data) - Experience identifying findings, delivering a solution, and rolling out to production - Strong understanding of essential performance metrics and core web vitals (page load, responsiveness, app startup time, frame rate, stability) - Experience with debugging tools: Chrome DevTools, Lighthouse, WebPageTest -Working knowledge of modern web technologies and native mobile app architectures ( how you drive change ) . -Experience with CDNs, caching strategies, and cloud environments (AWS preferred). - Experience with web architecture and devops -Comfortable working with logs, monitoring tools, and observability platforms. -Experience supporting high-traffic ecommerce or similarly large customer-facing systems - Xcode Instruments - Android Studio Profilers - Mobile or platform experience - Familiarity with CI/CD pipelines and performance automation. - Leveraging AI for web performance - Python